(Murray)
Diagnosis: Shell pear-, egg- or cupola-shaped. Peristome laterally compressed, with slit-shaped opening, with two slightly divergent oral spines, running parallel, converging or crossing. Two to five (usually 3 or 4) aboral spines bending sharply toward the aboral end. All spines with 4-5 basal pores, and curved thorns along the length.
Length: 1.2-1.6 mm.